Home / 656,511.20-985,155.60-478,570.40

Finding the Fourth Proportional to 656,511.20, 985,155.60 and 478,570.40

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Solution

The fourth proportional to 656,511.20, 985,155.60 and 478,570.40 is: 718,139.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,511.20 : 985,155.60 = 478,570.40 : x
  2. Step 2: Convert to fraction form
    656,511.20/985,155.60 = 478,570.40/x
  3. Step 3: Cross multiply
    656,511.20x = 985,155.60 × 478,570.40
  4. Step 4: Simplify right side
    656,511.20x = 471,466,309,554.24
  5. Step 5: Solve for x
    x = 471,466,309,554.24/656,511.20
  6. Step 6: Final answer
    x = 718,139.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.